package mybatis.plugins;

import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import java.util.regex.Matcher;

import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;  
  
  
@Intercepts({  
        @Signature(type = Executor.class, method = "update", args = {  
                MappedStatement.class, Object.class }),  
        @Signature(type = Executor.class, method = "query", args = {  
                MappedStatement.class, Object.class, RowBounds.class,  
                ResultHandler.class }) })  
public class MybatisInterceptor implements Interceptor {  
	final static Logger logger = LogManager.getLogger(MybatisInterceptor.class);
    private Properties properties;  
  
    @Override  
    public Object intercept(Invocation invocation) throws Throwable {  
        try{  
            MappedStatement mappedStatement = (MappedStatement) invocation  
                    .getArgs()[0];  
            Object parameter = null;  
            if (invocation.getArgs().length > 1) {  
                parameter = invocation.getArgs()[1];  
            }  
            String sqlId = mappedStatement.getId();  
            BoundSql boundSql = mappedStatement.getBoundSql(parameter);  
            Configuration configuration = mappedStatement.getConfiguration();  
            String sql = getExecuteableSql(configuration, boundSql, sqlId, 0);  
            logger.info(sql);  
        }catch(Exception e){  
        	logger.error(e.getMessage(), e);  
        }  
        //}  
        return invocation.proceed();  
    }  
  
    public static String getExecuteableSql(Configuration configuration, BoundSql boundSql,  
            String sqlId, long time) {  
        String sql = formatExecuteableSql(configuration, boundSql);  
        StringBuilder str = new StringBuilder(100);  
        str.append("执行语句");
        str.append(sqlId);
        str.append("：");
        str.append(sql);
        return str.toString();
    }  
  
    private static String getParameterValue(Object obj) {  
        String value = null;  
        if (obj instanceof String) {  
            value = "'" + obj.toString() + "'";  
        } else if (obj instanceof Date) {  
            DateFormat formatter = DateFormat.getDateTimeInstance(  
                    DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);  
            value = "'" + formatter.format(new Date()) + "'";  
        } else {  
            if (obj != null) {  
                value = obj.toString();  
            } else {  
                value = "";  
            }  
  
        }  
        return value;  
    }  
    
    /**
     * FIXME:iter循环参数，存储过程。。。打印执行结果
     * @param configuration
     * @param boundSql
     * @return
     */
    public static String formatExecuteableSql(Configuration configuration, BoundSql boundSql) {  
        Object parameterObject = boundSql.getParameterObject();  
        List<ParameterMapping> parameterMappings = boundSql  
                .getParameterMappings();  
        String sql = boundSql.getSql().replaceAll("[\\s]+", " ");  
        if (!parameterMappings.isEmpty() && parameterObject != null) {  
            TypeHandlerRegistry typeHandlerRegistry = configuration  
                    .getTypeHandlerRegistry();  
            if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {  
                sql = sql.replaceFirst("\\?",  
                        Matcher.quoteReplacement(getParameterValue(parameterObject)));  
  
            } else {  
                MetaObject metaObject = configuration  
                        .newMetaObject(parameterObject);  
                for (ParameterMapping parameterMapping : parameterMappings) {  
                    String propertyName = parameterMapping.getProperty();  
                    if (metaObject.hasGetter(propertyName)) {  
                        Object obj = metaObject.getValue(propertyName);  
                        sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));  
                    } else if (boundSql.hasAdditionalParameter(propertyName)) {  
                        Object obj = boundSql  
                                .getAdditionalParameter(propertyName);  
                        sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));  
                    }else{sql=sql.replaceFirst("\\?","缺失");}//打印出缺失，提醒该参数缺失并防止错位  
                }  
            }  
        }  
        return sql;  
    }  
  
    @Override  
    public Object plugin(Object target) {  
        return Plugin.wrap(target, this);  
    }  
  
    @Override  
    public void setProperties(Properties properties0) {  
        this.properties = properties0;  
    }  
}  